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OBDII/EOBD diagnostics trouble codes definition

If your car supports OBD II or EOBD, then you can already use almost 5000 generic OBDII codes. These codes are from PowerTrain series (P0XXX, P2XXX, P34XX), Body Series (B0XXX), Chassis series (C0XXX), Network series (U0XXX, U2XXX, U3XXX).

Also there is a list of more than 13500 additional manufacturer specific codes.

Supported manufacturers with specific OBD2 codes:


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Definition of check engine code P1604:

BMW:

Control Module Self-Test, Speed Monitoring

Chrysler/Dodge/Jeep:

PCM Internal Dual-Port RAM Read/Write Integrity Failure

Citroen/Peugeot:

Code Word Unregestered

Daewoo:

TPS COMM MAL

Fiat:

Main relay

Ford:

Code Word Unregestered

GM:

Loss of IPC Serial Data

Mazda:

Immobilizer System Fault

Mercedes:

Code Word Unregistered

Opel:

Engine control module (ECM) - defective

Saab:

Internal Control Module Malfunction

Volkswagen/Audi:

Internal Control Module Driver Error

Volvo:

Internal Control Module Driver Error